LDAPCmp feature to compare nTSecurityDescriptors

LDAPCmp feature to compare nTSecurityDescriptors

New feature that enables LDAPCmp users to find unmatched or
missing ACEs in objects for the three naming contexts between
DCs in one domain (default) or different domains. Comparing
security descriptors is not the default action but attribute
compatison. So to activate the new mode there is --sd switch.
However there are two view modes to the new --sd action which
are 'section' (default) or 'collision'. In 'section' mode you
can only find differences connected to missing or value
unmatched ACEs but not disorder unmatch if ACE values and count
are the same. All of the mentioned differences plus disorder
ACE unmatch you can observe under 'collision' view however
it is more verbose.

Signed-off-by: Anatoliy Atanasov <anatoliy.atanasov@postpath.com>